Variable-speed paper-machine drive train



Jan. 8, 1929.-

- H. F. DUNBAR VARIABLE SPEED PAPER MACHINE DRIVE TRAIN 3 Sheets-Shoat 1Filed Apfil 15, 1925 R 0 M w N J 1% w afa/my 416W A TTORNE Y.

Jan. 8, 1929.

H. F. DUNBAR VARIABLE SPEED PAPER MACHINE DRIVE TRAIN 1 I l [UAW/i1.

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. UNITED STATES PATENT OFFICE.

Application filed Apr11'13, 1925. Serial No. 22,800.

This invention relates to a variable speed pa er machine drive train.

, n object of the invention is to rovidc a hydraulic driving mechanismfor t e difi'er- 6 out parts or sections of a paper making machine, inorder that these parts or sections may be driven at different speeds asmay be desired. It is a well known'fact in the making of paper that itis very desirable to impart difi'erent'rates of travel to differentstrands or stretches of the web of paper between the different rolls "orother parts of the machine, or in other words to vary the draw .of theweb.

A further object is to provide means for connecting and disconnectingthe individual drive units of the machine from a main drive shaft, foradjusting the speed of each unit, after the s eed of the individualunits have been care illy adjusted the speed of the entire machine maybe regulated, as de sired, from the main drive shaft.

The sectional driving mechanism, broadly considered, comprises aplurality of prime or main driving motors that are suitably connected tosmall hydraulic pum s whici inturn, are connected by means 0 suitablepiping to hydraulic motors that are directly connected by means ofgearing and clutches to the different parts or sections of the papermachine. These pumps and hydraulic motors are sometimes spoken of asthe. Universal hydraulic variable speed gear, which is fully describedand illustrated in U. S. patent to Janney, No. 924,787, dated June 15,1909 for a variable speed transmission device and in catalogue No. 108,of the Waterbury Tool Company, Connecticut.

The several smallerhydraulic ydraulie motors which are connected to thedifferent parts or sections of the machineare known as the B end of thisgear.

Referring to the drawings:

Fig. 1 is a general plan view of the layout of a paper making machine,showing the several driving units for the various sections of themachine and the main shaft for simultaneously adjusting the speed of allof the units of the machine.

Fig. 2 illustrates one of the rolls of a paper making machine which isconnected, through a friction and square-jawed clutch, to the drivinggear, and, also illustrating the threel lway valve for operating thefriction c utc of \Vaterbury,

}pumps are known as the A end and the the handles for operating the twoclutches for adjusting the riving units.

Fig. 5 is a plan view of one of the two clutch constructions forthrowing in or out one of the units for adjusting the same.

Fig. 6 is an enlarged detail view of one of the sleeve elements on thehorizontal shaft which extends the entire length of the ma I chine.

Fig. 7 is a detail sectional view showing the sleeve in place on theadjusting shaft, the twosquare jawed clutches'and the worm gearwheel'construction foradjusting the l units. Fig. 8 is a detail planviewof the unit adgusting shaft showin two of the unit adjusting devicesand t ree of the interposed.

universal joints in this shaft.

Fig. 9 is a side elevational view of Fig. 8 showing one of the maindrive motors and'two of the A Referrin to the drawings in detail:

1, 2, and 3 designate the base-piecesibr end hydraulic pumps.

supporting the prime movers 4, 5, and 6 which are mounted. thereon.These movers may be electric motors. ends of these prime or driventhereby are the pumps 7, 8, 9, 10, 11, and 12 sometimes desighated asthe A end pumps. The opposite ends of these smaller pumps are severallyand hydraulically connected by the pi y es 13, 14, 15,16, 17, 1s, 19,20, 21, 22, 23, an 24 to the motors 25, 26, 27, 28-, 28 and 29; thesemotors are sometimes designated as the B end motors of the individualdrive units. These two hydraulically connected pumps and motors areknown in the art as the universal, hydraulic variable speed gearreferred to in the above mentioned catalogue, which rear, in general,comprises two rotating dis s therein, one of which is capable of beingadjusted and set in planes at difierent angles relative to the axis ofthe shaft, whereby the rate of rotation of the driven or B end motors 25to 29 inclusive'may be very accuratelyadjusted. The construction ofthese sectional driving pumps :and'motors or what is known as theuniversalhydraulic variable speed gear do not,'however, form any part ofmy At the opposite main motors, and

present invention.

smaller hydraulic slack of a strand of paper of any part of the machinemay be adjusted independently of the rate of rotation of ankother partof a paper making machine. ach one of the main driving pumps 7 to12'inclusive may therefore be adjusted in order that each one of thedriven motors to 29 may be rotated at a definite speed for operating thedifferent rolls or parts, etc. of a paper machine. These different partsof the machine are as follows: 30 is a wire screen; 31 the first pressroll; 32 the second press roll; 33 the steam heated dryer rolls; 34 thesizing press roll;

and 35the revolving cutter. Extending vertically of each of the A endpumps 7 to 12 are shafts 36, which are operated from the mainlongitudinally extending motor adjusting shaft 37. 38 designates a bevelgear connection between the main shaft 37 and the several verticallyarran ed shafts 36, (see Fig. 9) whereby when the shaft 37 is operatedby any one of the hand wheels 39 all of the driving or A end pumps 7 to12 will be simultaneously operated, or adjusted, with the result thatthe rate of rotation of all of the driven orB end motors. iscorrespondingly adjusted.

The rate of movement of the different parts 30 to 35 of the paper makingmachine will consequently be equally changed. It is to be particularlyunderstood that the main motor adjusting shaft 37 is not to be operateduntil the rate of rotation of the different sectional parts or units 30to 35 of the machine have been first carefully and independentlyadjusted. This is effected by the mechanism shown in Figs. 4 to 9inclusive which is constructed as will be described. The pipes 13 to 24inclusive are understood to be completely filled with some suitableliquid as thin oil. The flow of the liquid .back and forth between theseveral driving A end pumps 7 to 12 and the several driven B end motors25 to 29 serves to operate the driven motors of the universal hydraulicvariable speed gear.

Referring now to Fig. 3 in which one of the sections or units of a papermaking machine is shown. as for example, the part 31, which is the firstpress roll. Connected to this roll is a s uare jawed clutch or coupling40. 25 to 29 designates the B end motors of the universal gear. Thismotor is con nected to a driving pinion 42 of a herring bone gear. Themotor 25 is connected to the pinion 42 by the flexible coupling 43. Oneend of this coupling is connected to the motor 25 and its other end tothe short shaft 44. This shaft, with the pinion 42 is supported at itsopposite ends in ball bearing pillow blocks 45. This pinion meshes withthe large double herring bone gear 46 which 18 loosely mounted for freerotation on the drive shaft 47. For the pn use of connecting the gear 46to the she. t 47 a friction clutch is provided which is operated by bywhen the piston 50 is operated the friction clutch may be thrown intoand out of action thereby connecting and disconnecting the gear 46 tothe shaft 47. For the purpose of operating the piston 50 pipes 54 and 55are connected to the opposite ends of the cylinder 49 for admitting asuitable liquid, under pressure, into and from the opposite ends of thecylinder. This liquid is controlled by means of the three port valve 56which controls the flow of the liquid pressure into and away from theopposite ends of the cylinder 49. 57 is the operating handle and pins 58are provided for limiting the extent of movement of the handle. The part56' is the inlet pressure port and 56 the discharging port.

For the purpose of-supplyinglubricatmg oil to the teeth of the gearwheels 42 and 46 a pump 59- is provided which is driven by the chain 60.61 is a pipe which delivers the oil directly onto the teeth of thegears.

The main controlling shaft 37 is for changing the angle and consequentlythe speed of all of the A end pumps 7 to 12.

Referring now to the devices for adjusting the different sections orunits of the machine and for simultaneously adjusting all of thesections. 62 designates a bevel gear secured to the upper end of theshaft 36. This gear meshes with the bevel pinion 63 which is an integralpart of the sleeve member 64 (see Fig. 6) which is supported in thebearing 64', as shown in 7. The

opposite end of the sleeve is formed with a member 64. The hub part ofthis gear is formed with a square jaw clutch '69. Lo-

,cated at the ri ht hand end of the clutch 69 is a second c utch 70which slides on the sleeve 64. This second clutch is slidably mounted ona key 71 which is secured to the sleeve 64. Each of these slidableclutches is provided with a forked operating lever 72 and 73 for movingthe slidable clutch members 66 and 70,-respectively, into or out ofengagement with the clutches 65 or 69. For the purpose of operating theworm wheel 68 a hand wheel 74 is provided that is attached to the shaft75 having the worm 76 which meshes with the teeth of the worm gear wheel68.

. rality of The operation of this speed controlling art of myimprovement is as follows:

hould it be desirable to simultaneously adjust the speed of all of thesections or units of the machine from 30 to 35, the operator moves allof the levers 72 towards the left hand whereby all of the-nsmall jawclutches 66 which are keyed to the main shaft 37 are placed inengagement with the jaw clutches of the sleeve 64. The clutches 69 areall out of engagement. This operation through the spline connectionbetween the slidable collar which is formed with the jaws 66, and themain shaft 37 connects all of the shafts 36 through the gears 62 and 63.The shaft 37 is now operated by any one of the hand wheels 39, wherebyall of the shafts 36 are rotated and the motion transmitted to thetilting box controls since the clutch 66 connects with the sleeve andthe shaft 37. Should it be desirable to individually adjust any one ofthe sections or units of the machine indicated at 30 to 35 in Fig. 1,the operator by means of the lever 72 throws the clutch 66 out ofengagement with the clutch on the sleeve 64. He also throws the slidableclutch member into engagement with the clutch jaws 69. This connects theworm gear 68 only with one of the sleeves 64. Now, when one of the handwheels 74 is operated the worm gear will through the bevel pinion 63,gear 62, shaft 36, adjust the tilting box control of the pump 7 or anydesired one of the A end pumps, whereby the speed of the particularsgction or unit will be accurately adjusted as desired.

The worm gears 68 may be freely rotated on the sleeves when the clutchesat its ends are out of engagement. This permits the teeth of theclutches to be aligned so that they will mesh.

The universal joints 77 in the main control shaft 37 are employed forcompensating for any misalignment of this shaft.

It will be seen that I have provided a Very efiicient means for varyingthe speed of any particular section of paper making machine byhydraulically operated motors, and, in additio'mthe speed of all of themotors of the different sections may be simultaneously controlled.

What I claim is:

1. A variable speed driving mechanism for the different sections of apaper making machine comprising in combination, a plumam motors, aplurality of pumps operated by the main motors, a plurality of othermotors, h draulically connected to the pumps, means or individuallyadjusting the capacity of the pumps comprisinga main shaft, a gearloosely mounted thereon, means for operating the gear, means forconnecting and disconnecting the gear to the main shaft, and operativeconnecting means between the main shaft, and any one of the pumps.

2. A variable speed driving mechanism for the different sections of apaper making machine for varying the draw of the web, comprising incombination, a plurality of main motors, a plurality of pumps 0 eratedby the main motors, a plurality 0 other motors,

capacity of the pumps comprising a main shaft, a gear loosely mountedthereon, means for operating the gear, means for connecting anddisconnecting the gear to the main shaft, and operative connecting meansbetween the main shaft and anyone of the umps, the construction andarrangement eing such that the individual adjustment of the pumps may bedisconnected and the capacity of all of the pumps adjusted atthe sametime.

3. A drive mechanism for the different sections of a paper makingmachine com prising a main motor, a plurality of pumps operatedtherefrom, means for individually adjusting the capacitylof the pumpscomprising a shaft, sleeves on the shaft, one-end of each of the sleeveshaving a pinion gear, second gears with which the pinion gears mesh,means for connecting the second gears to the pumps for adjusting thecapacity of the same, and means for individually operating the sleeves.

4. A drive mechanism for .the different sections of a paper makingmachine comprising a main motor, a vplurality of pumps operatedtherefrom, means for individually adjusting the capacity of the pumpscomprising a shaft, sleeves on the shaft, one end of each of the sleeveshaving a pinion gear, second gears with which the pinion gears mesh,means for connecting the second gears to the pumps for adjusting thecaaeity of the same, and means for individual y operaing the sleeves andmeans for adjusting all of the pumps at the same time comprisingslidable clutches on the shaft for connecting all of the sleeves to theshaft whereby when the shaft is operated all of the pumps will beadjusted.

HAROLD F. DUN BAR.

hydraulically connected to the pumps, means for individually adjustingthe

